import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import qs from 'qs'

// create an axios instance
const service = axios.create({
    // baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
    // withCredentials: true, // send cookies when cross-domain requests
    timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
    config => {
        // do something before request is sent

        // if (store.getters.token) {
        //     // let each request carry token
        //     // ['X-Token'] is a custom headers key
        //     // please modify it according to the actual situation
        //     config.headers['X-Token'] = getToken()
        // }
        return config
    },
    error => {
        // do something with request error
        console.log(error) // for debug
        return Promise.reject(error)
    }
)

// response interceptor
service.interceptors.response.use(
        /**
         * If you want to get http information such as headers or status
         * Please return  response => response
         */

        /**
         * Determine the request status by custom code
         * Here is just an example
         * You can also judge the status by HTTP Status Code
         */
        response => {
            const res = response.data

            return res
                // if the custom code is not 20000, it is judged as an error.
                // if (res.code !== 20000) {
                //   Message({
                //     message: res.message || 'Error',
                //     type: 'error',
                //     duration: 5 * 1000
                //   })

            //   // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
            //   if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
            //     // to re-login
            //     MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
            //       confirmButtonText: 'Re-Login',
            //       cancelButtonText: 'Cancel',
            //       type: 'warning'
            //     }).then(() => {
            //       store.dispatch('user/resetToken').then(() => {
            //         location.reload()
            //       })
            //     })
            //   }
            //   return Promise.reject(new Error(res.message || 'Error'))
            // } else {
            //   return res
            // }
        },
        error => {
            console.log('err' + error) // for debug
            Message({
                message: error.message,
                type: 'error',
                duration: 5 * 1000
            })
            return Promise.reject(error)
        }
    )
    //对get和post进行集成

function http(configOptions) {
    var config = {}
    config.url = configOptions.url
    if (configOptions.method.toLowerCase() == 'get') {
        // 针对get处理 参数应该放到params中
        config.method = 'get'
        config.params = configOptions.data
    } else if (configOptions.method.toLowerCase() == 'post') {
        config.method = 'post'
            // post提交设置请求头
        config.headers = { 'content-type': 'application/x-www-form-urlencoded' };
        // 需要用qs对数据进行序列化处理
        // 思考: 不处理会出现什么情况?以及数据提交的多种格式分别是什么?
        // 1.  { a: { b: { c: 'd', e: 'f' } } } ==> 'a.b.c=d&a.b.e=f'
        // 2. { a: ['b', 'c'] } ==> 'a=b&a=c'
        config.data = qs.stringify(configOptions.data, { allowDots: true, arrayFormat: 'repeat' })
    }
    // 转换后的config注入到axios中
    return service(config)
}

export default http